Stratigraphy of the Cretaceous Hornbrook Formation, southern Oregon and northern CaliforniaTor Helge Nilsen · First published 1993Open the Tome
Sacramento Valley symposium and guidebookRaymond V. Ingersoll, Tor Helge Nilsen, Society of Economic Paleontologists and Mineralogists. Pacific Section · First published 1990Open the Tome
Sedimentation and tectonics in coastal southern CaliforniaPatrick L. Abbott, Martin H. Link, Tor Helge Nilsen · First published 1989Open the Tome
Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio mountains, CaliforniaTor Helge Nilsen · First published 1987Open the Tome
Modern and Ancient Alluvial Fan Deposits (Benchmark Papers in Geology, Vol 87)Tor Helge Nilsen · First published 1985Open the Tome
Geology of the Upper Cretaceous Hornbrook Formation, Oregon and CaliforniaTor Helge Nilsen · First published 1984Open the Tome
Stratigraphic nomenclature for the upper Devonian and lower Mississippian(?) Kanayut conglomerate, Brooks Range, AlaskaTor Helge Nilsen · First published 1984Open the Tome
Sedimentology and stratigraphy of the Kanayut Conglomerate, central and western Brooks Range, AlaskaTor Helge Nilsen · First published 1982Open the Tome
Reconnaissance study of Upper Cretaceous to Miocene stratigraphic units and sedimentary facies, Kodiak and adjacent islands, AlaskaTor Helge Nilsen · First published 1979Open the Tome
Relative slope stability and land-use planning in the San Francisco Bay region, CaliforniaTor Helge Nilsen · First published 1979Open the Tome
Natural conditions that control landsliding in the San Francisco Bay regionTor Helge Nilsen · First published 1976Open the Tome
Recent landslides in Alameda County, California (1940-71)Tor Helge Nilsen · First published 1976Open the Tome
Influence of rainfall and ancient landslide deposits on recent landslides (1950-71) in urban areas of Contra Costa County, CaliforniaTor Helge Nilsen · First published 1975Open the Tome
Sedimentation and tectonics in the early Tertiary continental borderland of central CaliforniaTor Helge Nilsen · First published 1975Open the Tome
Lower and Middle tertiary stratigraphic units of the San Emigdio and western Tehachapi Mountains, CaliforniaTor Helge Nilsen · First published 1973Open the Tome
The relationship of sedimentation to tectonics in the Solund Devonian district of southwestern NorwayTor Helge Nilsen · First published 1968 · Latest edition 1969Open the Tome
